rsync-backup.js

#!/usr/bin/env node
var sys = require('sys');
var exec = require('child_process').exec;

const RSYNC = '/usr/bin/rsync';
const SSH = '/usr/bin/ssh';
const BANDWIDTH_LIMIT = 512; // Kbps

// Backup destinations
var stores = {
   'directory': {
      type: 'local',
      destination: '/Volumes/MY BACKUP VOL/',
      flags: '-arz'
   },

   'ssh': {
      type: 'ssh',
      flags: '-arz --bwlimit=' + BANDWIDTH_LIMIT + ' -e "' + SSH + ' -l myuser" --delete myserver:/backups'
   }
}

// Folders to backup
var targets = {
   'folder1': {
      source: '/folder/to/backup',
      flags: "--delete --exclude '.DS_Store'",

      background: false
   },

   'folder2': {
      source: '/folder/to/also/backup',
      flags: "--exclude '.DS_Store'",

      background: false
   }
}

for (var k in targets) {
   for (var s in stores) {
      var cmd = RSYNC;

      var store = stores[s];
      var target = targets[k];

      switch(s) {
         case 'directory':
            if (!target.source || !store.destination) {
               continue;
            }

            cmd += (store.flags ? ' ' + store.flags : '');
            cmd += (target.flags ? ' ' + target.flags : '');
            cmd += (target.source ? ' \'' + target.source + '\'' : '');
            cmd += (store.destination ? ' \'' + store.destination + '\'': '');
            cmd += (target.background ? ' &' : '');
            break;

         case 'ssh':
            if (!target.source || !store.flags) {
               continue;
            }

            cmd += (target.flags ? ' ' + target.flags : '');
            cmd += (target.source ? ' \'' + target.source + '\'' : '');
            cmd += (store.flags ? ' ' + store.flags : '');
            cmd += (target.background ? ' &' : '');
            break;

         default:
            break;
      }

      console.log('Running ' + cmd);
      exec(cmd, function(err, stdout, stderr) {
         if (err) console.log('[ERROR] ' + err);
         // if (stdout) console.log('[STDOUT] ' + stdout);
         if (stderr) console.log('[STDERR] ' + stderr);
      });
   }
}